Some common modem problems are the modem not dialing, the modem not being recognizable by the computer, the modem disconnecting frequently and an extremely slow connection. Other common problems include issues with dialing a particular number and modem installation problems.
Issues with a modem not dialing are the result of improper modem setup, the wrong number used, problems with the Internet Service Provider or low-quality phone lines. Additionally, using free trial offers from other ISPs or from the Internet affects the existing installation and causes modem problems.
Frequent disconnection of a modem occurs when additional devices like phones, fax machines and answering machines are connected to the same phone line and send out signals, resulting in the disconnection.